Magnetic Field Coupling


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 Code Number :   8B10.37

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Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

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Condition :   Excellent
Principle :   Magnetic Field Coupling
Area of Study :  Stellar Astronomy
Equipment :   Pyrex dish, Lycopodium powder, tennis ball.

Procedure :   Place the tennis ball on the bench and spin it observing that the ball spins for a long period of time.  Place the dish with the Lycopodium powder and water on an overhead projector.  Then position the ball above the dish with water and Lycopodium powder and spin it and allow it to drop into the dish.  Notice that the ball drags a layer of water around with it and slows down fairly quickly. 
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Mail Questions and Comments to:  Dale Stille